| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable to adjust light for next photographing and to photograph with proper light, when photographing a same eye to be examined continuously. <P>SOLUTION: (S11) Pupillary zone is extracted through a binarizing process using a proper threshold of the difference of brightness between the iris and pupil of an anterior ocular segment image. (S12) Pupil diameter D is calculated from the separated pupillary zone. (S13) Light to be increased for photographing is calculated from a conversion table for increased light value based on the pupil diameter D. When the light to be increment values of the pupil diameter D: 2.5 mm 0.8, 3.0 mm 0.6, 3.5 mm 0.4, 4.0 mm 0.3 (S14) is calculated, the light for the next photographing is calculated by adding the value to the previous light value. In this example, if the pupil diameter is 2.5 mm and the previous light value is F0, the light value for the next photographing will be set to F0+0.8. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
